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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::experimental::ranges::</span>copy, <span style="font-size:0.7em; line-height:130%">std::experimental::ranges::</span>copy_if</h1>
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<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="all_any_none_of.html" title="cpp/experimental/ranges/algorithm/all any none of"><span class="t-lines"><span>all_of</span><span>any_of</span><span>none_of</span></span></a></div></div></td></tr>
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</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/find&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/find（页面不存在）"><span class="t-lines"><span>find</span><span>find_if</span><span>find_if_not</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/find_end&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/find end（页面不存在）"><span class="t-lines"><span>find_end</span></span></a></div></div></td></tr>
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<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/search&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/search（页面不存在）"><span class="t-lines"><span>search</span></span></a></div></div></td></tr>
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<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/mismatch&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/mismatch（页面不存在）"><span class="t-lines"><span>mismatch</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5">                              </td></tr>
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</td></tr>
<tr class="t-nv"><td colspan="5"> <br>
</td></tr>
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<tr class="t-nv-h2"><td colspan="5">修改序列的操作</td></tr>
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<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><strong class="selflink"><span class="t-lines"><span>copy</span><span>copy_if</span></span></strong></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/copy_n&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/copy n（页面不存在）"><span class="t-lines"><span>copy_n</span></span></a></div></div></td></tr>
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<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/move_backward&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/move backward（页面不存在）"><span class="t-lines"><span>move_backward</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5">                              </td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/fill&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/fill（页面不存在）"><span class="t-lines"><span>fill</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/fill_n&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/fill n（页面不存在）"><span class="t-lines"><span>fill_n</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/generate&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/generate（页面不存在）"><span class="t-lines"><span>generate</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/generate_n&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/generate n（页面不存在）"><span class="t-lines"><span>generate_n</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/swap_ranges&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/swap ranges（页面不存在）"><span class="t-lines"><span>swap_ranges</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/shuffle&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/shuffle（页面不存在）"><span class="t-lines"><span>shuffle</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/transform&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/transform（页面不存在）"><span class="t-lines"><span>transform</span></span></a></div></div></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/remove&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/remove（页面不存在）"><span class="t-lines"><span>remove</span><span>remove_if</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/replace&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/replace（页面不存在）"><span class="t-lines"><span>replace</span><span>replace_if</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/reverse&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/reverse（页面不存在）"><span class="t-lines"><span>reverse</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/rotate&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/rotate（页面不存在）"><span class="t-lines"><span>rotate</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/unique&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/unique（页面不存在）"><span class="t-lines"><span>unique</span></span></a></div></div></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/remove_copy&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/remove copy（页面不存在）"><span class="t-lines"><span>remove_copy</span><span>remove_copy_if</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/replace_copy&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/replace copy（页面不存在）"><span class="t-lines"><span>replace_copy</span><span>replace_copy_if</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/reverse_copy&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/reverse copy（页面不存在）"><span class="t-lines"><span>reverse_copy</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/rotate_copy&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/rotate copy（页面不存在）"><span class="t-lines"><span>rotate_copy</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/unique_copy&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/unique copy（页面不存在）"><span class="t-lines"><span>unique_copy</span></span></a></div></div></td></tr>
</table></div></td></tr>
<tr class="t-nv-h2"><td colspan="5">划分操作</td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/is_partitioned&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/is partitioned（页面不存在）"><span class="t-lines"><span>is_partitioned</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/partition_point&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/partition point（页面不存在）"><span class="t-lines"><span>partition_point</span></span></a></div></div></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/partition&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/partition（页面不存在）"><span class="t-lines"><span>partition</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/partition_copy&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/partition copy（页面不存在）"><span class="t-lines"><span>partition_copy</span></span></a></div></div></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/stable_partition&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/stable partition（页面不存在）"><span class="t-lines"><span>stable_partition</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"> <br>
</td></tr>
</table></div></td></tr>
<tr class="t-nv-h2"><td colspan="5">排序操作</td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/is_sorted&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/is sorted（页面不存在）"><span class="t-lines"><span>is_sorted</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/is_sorted_until&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/is sorted until（页面不存在）"><span class="t-lines"><span>is_sorted_until</span></span></a></div></div></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="sort.html" title="cpp/experimental/ranges/algorithm/sort"><span class="t-lines"><span>sort</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/stable_sort&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/stable sort（页面不存在）"><span class="t-lines"><span>stable_sort</span></span></a></div></div></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/partial_sort&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/partial sort（页面不存在）"><span class="t-lines"><span>partial_sort</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/partial_sort_copy&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/partial sort copy（页面不存在）"><span class="t-lines"><span>partial_sort_copy</span></span></a></div></div></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/nth_element&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/nth element（页面不存在）"><span class="t-lines"><span>nth_element</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"> <br>
</td></tr>
</table></div></td></tr>
<tr class="t-nv-h2"><td colspan="5">二分搜索操作</td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/lower_bound&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/lower bound（页面不存在）"><span class="t-lines"><span>lower_bound</span></span></a></div></div></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/upper_bound&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/upper bound（页面不存在）"><span class="t-lines"><span>upper_bound</span></span></a></div></div></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/binary_search&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/binary search（页面不存在）"><span class="t-lines"><span>binary_search</span></span></a></div></div></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/equal_range&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/equal range（页面不存在）"><span class="t-lines"><span>equal_range</span></span></a></div></div></td></tr>
</table></div></td></tr>
<tr class="t-nv-h2"><td colspan="5">集合操作（在已排序范围上）</td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/merge&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/merge（页面不存在）"><span class="t-lines"><span>merge</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/inplace_merge&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/inplace merge（页面不存在）"><span class="t-lines"><span>inplace_merge</span></span></a></div></div></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/includes&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/includes（页面不存在）"><span class="t-lines"><span>includes</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5">                              </td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/set_difference&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/set difference（页面不存在）"><span class="t-lines"><span>set_difference</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/set_intersection&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/set intersection（页面不存在）"><span class="t-lines"><span>set_intersection</span></span></a></div></div></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/set_symmetric_difference&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/set symmetric difference（页面不存在）"><span class="t-lines"><span>set_symmetric_difference</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/set_union&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/set union（页面不存在）"><span class="t-lines"><span>set_union</span></span></a></div></div></td></tr>
</table></div></td></tr>
<tr class="t-nv-h2"><td colspan="5">堆操作</td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/is_heap&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/is heap（页面不存在）"><span class="t-lines"><span>is_heap</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/is_heap_until&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/is heap until（页面不存在）"><span class="t-lines"><span>is_heap_until</span></span></a></div></div></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/make_heap&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/make heap（页面不存在）"><span class="t-lines"><span>make_heap</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/sort_heap&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/sort heap（页面不存在）"><span class="t-lines"><span>sort_heap</span></span></a></div></div></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/push_heap&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/push heap（页面不存在）"><span class="t-lines"><span>push_heap</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/pop_heap&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/pop heap（页面不存在）"><span class="t-lines"><span>pop_heap</span></span></a></div></div></td></tr>
</table></div></td></tr>
<tr class="t-nv-h2"><td colspan="5">最小/最大操作</td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/max&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/max（页面不存在）"><span class="t-lines"><span>max</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/max_element&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/max element（页面不存在）"><span class="t-lines"><span>max_element</span></span></a></div></div></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/min&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/min（页面不存在）"><span class="t-lines"><span>min</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/min_element&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/min element（页面不存在）"><span class="t-lines"><span>min_element</span></span></a></div></div></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/minmax&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/minmax（页面不存在）"><span class="t-lines"><span>minmax</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/minmax_element&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/minmax element（页面不存在）"><span class="t-lines"><span>minmax_element</span></span></a></div></div></td></tr>
</table></div></td></tr>
<tr class="t-nv-h2"><td colspan="5">排列</td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/is_permutation&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/is permutation（页面不存在）"><span class="t-lines"><span>is_permutation</span></span></a></div></div></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/next_permutation&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/next permutation（页面不存在）"><span class="t-lines"><span>next_permutation</span></span></a></div></div></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/prev_permutation&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/prev permutation（页面不存在）"><span class="t-lines"><span>prev_permutation</span></span></a></div></div></td></tr>
</table></div></td></tr>
</table></div><div></div></div></div></div><div class="t-navbar-sep"> </div></div>
<table class="t-dcl-begin"><tbody>
<tr class="t-dsc-header">
<td> <div>定义于头文件 <code><a href="../../../header/experimental/ranges/algorithm.html" title="cpp/header/experimental/ranges/algorithm">&lt;experimental/ranges/algorithm&gt;</a></code>
 </div></td>
<td></td>
<td></td>
</tr>
<tr class="t-dcl t-since-ranges">
<td> <div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span> <span class="sy1">&lt;</span> <a href="../iterator/InputIterator.html"><span class="kw2569">ranges::<span class="me2">InputIterator</span></span></a> I, <a href="../iterator/Sentinel.html"><span class="kw2567">ranges::<span class="me2">Sentinel</span></span></a><span class="sy1">&lt;</span>I<span class="sy1">&gt;</span> S,<br>
<p>           <a href="../iterator/WeaklyIncrementable.html"><span class="kw2564">ranges::<span class="me2">WeaklyIncrementable</span></span></a> O <span class="sy1">&gt;</span><br>
  requires <a href="../iterator/IndirectlyCopyable.html"><span class="kw2581">ranges::<span class="me2">IndirectlyCopyable</span></span></a><span class="sy1">&lt;</span>I, O<span class="sy1">&gt;</span><br>
ranges<span class="sy4">::</span><span class="me2">tagged_pair</span><span class="sy1">&lt;</span>ranges<span class="sy4">::</span><span class="me2">tag</span><span class="sy4">::</span><span class="me2">in</span><span class="br0">(</span>I<span class="br0">)</span>, ranges<span class="sy4">::</span><span class="me2">tag</span><span class="sy4">::</span><span class="me2">out</span><span class="br0">(</span>O<span class="br0">)</span><span class="sy1">&gt;</span><br>
</p>
  copy<span class="br0">(</span>I first, S last, O result<span class="br0">)</span><span class="sy4">;</span></span></div></td>
<td> (1) </td>
<td> <span class="t-mark-rev t-since-ranges-ts t-mark-ts">(范围 TS)</span> </td>
</tr>
<tr class="t-dcl t-since-ranges">
<td> <div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span> <span class="sy1">&lt;</span> <a href="../range/InputRange.html"><span class="kw2592">ranges::<span class="me2">InputRange</span></span></a> Rng, <a href="../iterator/WeaklyIncrementable.html"><span class="kw2564">ranges::<span class="me2">WeaklyIncrementable</span></span></a> O <span class="sy1">&gt;</span><br>
<p>  requires <a href="../iterator/IndirectlyCopyable.html"><span class="kw2581">ranges::<span class="me2">IndirectlyCopyable</span></span></a><span class="sy1">&lt;</span>ranges<span class="sy4">::</span><span class="me2">iterator_t</span><span class="sy1">&lt;</span>Rng<span class="sy1">&gt;</span>, O<span class="sy1">&gt;</span><br>
ranges<span class="sy4">::</span><span class="me2">tagged_pair</span><span class="sy1">&lt;</span><br>
  ranges<span class="sy4">::</span><span class="me2">tag</span><span class="sy4">::</span><span class="me2">in</span><span class="br0">(</span>ranges<span class="sy4">::</span><span class="me2">safe_iterator_t</span><span class="sy1">&lt;</span>Rng<span class="sy1">&gt;</span><span class="br0">)</span>, ranges<span class="sy4">::</span><span class="me2">tag</span><span class="sy4">::</span><span class="me2">out</span><span class="br0">(</span>O<span class="br0">)</span><span class="sy1">&gt;</span> <br>
</p>
  copy<span class="br0">(</span>Rng<span class="sy3">&amp;&amp;</span> rng, O result<span class="br0">)</span><span class="sy4">;</span></span></div></td>
<td> (2) </td>
<td> <span class="t-mark-rev t-since-ranges-ts t-mark-ts">(范围 TS)</span> </td>
</tr>
<tr class="t-dcl t-since-ranges">
<td> <div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span> <span class="sy1">&lt;</span> <a href="../iterator/InputIterator.html"><span class="kw2569">ranges::<span class="me2">InputIterator</span></span></a> I, <a href="../iterator/Sentinel.html"><span class="kw2567">ranges::<span class="me2">Sentinel</span></span></a><span class="sy1">&lt;</span>I<span class="sy1">&gt;</span> S,<br>
<p>           <a href="../iterator/WeaklyIncrementable.html"><span class="kw2564">ranges::<span class="me2">WeaklyIncrementable</span></span></a> O,<br>
           <span class="kw1">class</span> Proj <span class="sy1">=</span> ranges<span class="sy4">::</span><span class="me2">identity</span>,<br>
           <a href="../iterator/IndirectUnaryPredicate.html"><span class="kw2576">ranges::<span class="me2">IndirectUnaryPredicate</span></span></a><span class="sy1">&lt;</span><a href="../iterator/projected.html"><span class="kw2597">ranges::<span class="me2">projected</span></span></a><span class="sy1">&lt;</span>I, Proj<span class="sy1">&gt;&gt;</span> Pred <span class="sy1">&gt;</span><br>
  requires <a href="../iterator/IndirectlyCopyable.html"><span class="kw2581">ranges::<span class="me2">IndirectlyCopyable</span></span></a><span class="sy1">&lt;</span>I, O<span class="sy1">&gt;</span><br>
ranges<span class="sy4">::</span><span class="me2">tagged_pair</span><span class="sy1">&lt;</span>ranges<span class="sy4">::</span><span class="me2">tag</span><span class="sy4">::</span><span class="me2">in</span><span class="br0">(</span>I<span class="br0">)</span>, ranges<span class="sy4">::</span><span class="me2">tag</span><span class="sy4">::</span><span class="me2">out</span><span class="br0">(</span>O<span class="br0">)</span><span class="sy1">&gt;</span><br>
</p>
  copy_if<span class="br0">(</span>I first, S last, O result, Pred pred, Proj proj <span class="sy1">=</span> Proj<span class="br0">{</span><span class="br0">}</span><span class="br0">)</span><span class="sy4">;</span></span></div></td>
<td> (3) </td>
<td> <span class="t-mark-rev t-since-ranges-ts t-mark-ts">(范围 TS)</span> </td>
</tr>
<tr class="t-dcl t-since-ranges">
<td> <div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span> <span class="sy1">&lt;</span> <a href="../range/InputRange.html"><span class="kw2592">ranges::<span class="me2">InputRange</span></span></a> Rng, <a href="../iterator/WeaklyIncrementable.html"><span class="kw2564">ranges::<span class="me2">WeaklyIncrementable</span></span></a> O,<br>
<p>           <span class="kw1">class</span> Proj <span class="sy1">=</span> ranges<span class="sy4">::</span><span class="me2">identity</span>,<br>
           <a href="../iterator/IndirectUnaryPredicate.html"><span class="kw2576">ranges::<span class="me2">IndirectUnaryPredicate</span></span></a><span class="sy1">&lt;</span><br>
             <a href="../iterator/projected.html"><span class="kw2597">ranges::<span class="me2">projected</span></span></a><span class="sy1">&lt;</span>ranges<span class="sy4">::</span><span class="me2">iterator_t</span><span class="sy1">&lt;</span>Rng<span class="sy1">&gt;</span>, Proj<span class="sy1">&gt;&gt;</span> Pred <span class="sy1">&gt;</span><br>
  requires <a href="../iterator/IndirectlyCopyable.html"><span class="kw2581">ranges::<span class="me2">IndirectlyCopyable</span></span></a><span class="sy1">&lt;</span>iterator_t<span class="sy1">&lt;</span>Rng<span class="sy1">&gt;</span>, O<span class="sy1">&gt;</span><br>
ranges<span class="sy4">::</span><span class="me2">tagged_pair</span><span class="sy1">&lt;</span><br>
  ranges<span class="sy4">::</span><span class="me2">tag</span><span class="sy4">::</span><span class="me2">in</span><span class="br0">(</span>ranges<span class="sy4">::</span><span class="me2">safe_iterator_t</span><span class="sy1">&lt;</span>Rng<span class="sy1">&gt;</span><span class="br0">)</span>, ranges<span class="sy4">::</span><span class="me2">tag</span><span class="sy4">::</span><span class="me2">out</span><span class="br0">(</span>O<span class="br0">)</span><span class="sy1">&gt;</span><br>
</p>
  copy_if<span class="br0">(</span>Rng<span class="sy3">&amp;&amp;</span> rng, O result, Pred pred, Proj proj <span class="sy1">=</span> Proj<span class="br0">{</span><span class="br0">}</span><span class="br0">)</span><span class="sy4">;</span></span></div></td>
<td> (4) </td>
<td> <span class="t-mark-rev t-since-ranges-ts t-mark-ts">(范围 TS)</span> </td>
</tr>
<tr class="t-dcl-sep"><td></td><td></td><td></td></tr>
</tbody></table>
<p>复制源范围（ <code>[first,last)</code> 或 <code>rng</code> ）中的元素到始于 <code>result</code> 的目标范围中，从源范围的首元素开始，后续到末元素。
</p>
<div class="t-li1"><span class="t-li">1)</span> 复制范围 <code>[first, last)</code> 中的所有元素。对每个非负整数 <code>n &lt; (last - first)</code> 进行 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">*</span><span class="br0">(</span>result <span class="sy2">+</span> n<span class="br0">)</span> <span class="sy1">=</span> <span class="sy2">*</span><span class="br0">(</span>first <span class="sy2">+</span> n<span class="br0">)</span></span></span> 。若 <code>result</code> 在范围 <code>[first, last)</code> 内则行为未定义。此情况下可用 <span class="t-lc">ranges::copy_backward</span> 代替。</div>
<div class="t-li1"><span class="t-li">2)</span> 同 <span class="t-v">(1)</span> ，但以 <code>rng</code> 为源范围，如同用 <span class="t-c"><span class="mw-geshi cpp source-cpp">ranges<span class="sy4">::</span><span class="me2">copy</span><span class="br0">(</span>ranges<span class="sy4">::</span><span class="me2">begin</span><span class="br0">(</span>rng<span class="br0">)</span>, ranges<span class="sy4">::</span><span class="me2">end</span><span class="br0">(</span>rng<span class="br0">)</span>, result<span class="br0">)</span><span class="sy4">;</span></span></span> ，除了不可复制 <code>result</code> 。</div>
<div class="t-li1"><span class="t-li">3)</span> 仅复制应用谓词 <code>pred</code> 到投影 <code>proj</code> 所投影的元素值时，对其返回 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw2">true</span></span></span> 的元素。保持复制后的元素顺序。若源与目标范围重叠则行为未定义。</div>
<div class="t-li1"><span class="t-li">4)</span> 同 <span class="t-v">(3)</span> ，但以 <code>rng</code> 为源范围，如同用 <span class="t-c"><span class="mw-geshi cpp source-cpp">ranges<span class="sy4">::</span><span class="me2">copy_if</span><span class="br0">(</span>ranges<span class="sy4">::</span><span class="me2">begin</span><span class="br0">(</span>rng<span class="br0">)</span>, ranges<span class="sy4">::</span><span class="me2">end</span><span class="br0">(</span>rng<span class="br0">)</span>, result, pred, proj<span class="br0">)</span><span class="sy4">;</span></span></span> ，除了不可复制 <code>result</code> 、 <code>pred</code> 和 <code>proj</code> 。</div>
<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">参数</span></h3>
<table class="t-par-begin">


<tr class="t-par">
<td>  first, last
</td>
<td> -
</td>
<td> 要复制的元素范围
</td></tr>
<tr class="t-par">
<td>  rng
</td>
<td> -
</td>
<td> 要复制的元素范围
</td></tr>
<tr class="t-par">
<td>  result
</td>
<td> -
</td>
<td> 目标范围的起始
</td></tr>
<tr class="t-par">
<td>  pred
</td>
<td> -
</td>
<td> 要应用到投影后元素的谓词
</td></tr>
<tr class="t-par">
<td>  proj
</td>
<td> -
</td>
<td> 要应用到元素的投影
</td></tr></table>
<h3><span class="mw-headline" id=".E8.BF.94.E5.9B.9E.E5.80.BC">返回值</span></h3>
<p>含有以下二个成员的 <code>tagged_pair</code> 对象：
</p>
<ul><li> 第一成员有标签 <code>tag::in</code> ，为源范围的尾后迭代器（即比较等于哨位 <code>last</code> 的 <code>I</code> 类型迭代器）。
</li><li> 第二成员有标签 <code>tag::out</code> ，为结果范围的尾后迭代器。
</li></ul>
<h3><span class="mw-headline" id=".E5.A4.8D.E6.9D.82.E5.BA.A6">复杂度</span></h3>
<div class="t-li1"><span class="t-li">1)</span> 准确赋值 <span class="t-c"><span class="mw-geshi cpp source-cpp">ranges<span class="sy4">::</span><span class="me2">distance</span><span class="br0">(</span>first, last<span class="br0">)</span></span></span> 次。</div>
<div class="t-li1"><span class="t-li">2)</span> 准确赋值 <span class="t-c"><span class="mw-geshi cpp source-cpp">ranges<span class="sy4">::</span><span class="me2">distance</span><span class="br0">(</span>rng<span class="br0">)</span></span></span> 次。</div>
<div class="t-li1"><span class="t-li">3)</span> 准确应用 <span class="t-c"><span class="mw-geshi cpp source-cpp">ranges<span class="sy4">::</span><span class="me2">distance</span><span class="br0">(</span>first, last<span class="br0">)</span></span></span> 次对应的投影和谓词。</div>
<div class="t-li1"><span class="t-li">3)</span> 准确应用 <span class="t-c"><span class="mw-geshi cpp source-cpp">ranges<span class="sy4">::</span><span class="me2">distance</span><span class="br0">(</span>rng<span class="br0">)</span></span></span> 次对应的投影和谓词。</div>
<h3><span class="mw-headline" id=".E5.8F.AF.E8.83.BD.E7.9A.84.E5.AE.9E.E7.8E.B0">可能的实现</span></h3>
<table class="eq-fun-cpp-table">

<tr>
<th> 版本一
</th></tr>
<tr>
<td>
<div dir="ltr" class="mw-geshi" style="text-align: left;"><div class="cpp source-cpp"><pre class="de1"><span class="kw1">template</span> <span class="sy1">&lt;</span><a href="../iterator/InputIterator.html"><span class="kw2569">ranges::<span class="me2">InputIterator</span></span></a> I, <a href="../iterator/Sentinel.html"><span class="kw2567">ranges::<span class="me2">Sentinel</span></span></a><span class="sy1">&lt;</span>I<span class="sy1">&gt;</span> S, <a href="../iterator/WeaklyIncrementable.html"><span class="kw2564">ranges::<span class="me2">WeaklyIncrementable</span></span></a> O<span class="sy1">&gt;</span>
  requires <a href="../iterator/IndirectlyCopyable.html"><span class="kw2581">ranges::<span class="me2">IndirectlyCopyable</span></span></a><span class="sy1">&lt;</span>I, O<span class="sy1">&gt;</span><span class="br0">(</span><span class="br0">)</span>
ranges<span class="sy4">::</span><span class="me2">tagged_pair</span><span class="sy1">&lt;</span>ranges<span class="sy4">::</span><span class="me2">tag</span><span class="sy4">::</span><span class="me2">in</span><span class="br0">(</span>I<span class="br0">)</span>, ranges<span class="sy4">::</span><span class="me2">tag</span><span class="sy4">::</span><span class="me2">out</span><span class="br0">(</span>O<span class="br0">)</span><span class="sy1">&gt;</span>
  copy<span class="br0">(</span>I first, S last, O result<span class="br0">)</span>
<span class="br0">{</span>
    <span class="kw1">for</span> <span class="br0">(</span><span class="sy4">;</span> first <span class="sy3">!</span><span class="sy1">=</span> last<span class="sy4">;</span> <span class="sy2">++</span>first, <span class="br0">(</span><span class="kw4">void</span><span class="br0">)</span><span class="sy2">++</span>result<span class="br0">)</span>
        <span class="sy2">*</span>result <span class="sy1">=</span> <span class="sy2">*</span>first<span class="sy4">;</span>
    <span class="kw1">return</span> <span class="br0">{</span>first, result<span class="br0">}</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div></div>
</td></tr>
<tr>
<th> 版本二
</th></tr>
<tr>
<td>
<div dir="ltr" class="mw-geshi" style="text-align: left;"><div class="cpp source-cpp"><pre class="de1"><span class="kw1">template</span> <span class="sy1">&lt;</span><a href="../range/InputRange.html"><span class="kw2592">ranges::<span class="me2">InputRange</span></span></a> Rng, <a href="../iterator/WeaklyIncrementable.html"><span class="kw2564">ranges::<span class="me2">WeaklyIncrementable</span></span></a> O<span class="sy1">&gt;</span>
  requires <a href="../iterator/IndirectlyCopyable.html"><span class="kw2581">ranges::<span class="me2">IndirectlyCopyable</span></span></a><span class="sy1">&lt;</span>ranges<span class="sy4">::</span><span class="me2">iterator_t</span><span class="sy1">&lt;</span>Rng<span class="sy1">&gt;</span>, O<span class="sy1">&gt;</span><span class="br0">(</span><span class="br0">)</span>
ranges<span class="sy4">::</span><span class="me2">tagged_pair</span><span class="sy1">&lt;</span>ranges<span class="sy4">::</span><span class="me2">tag</span><span class="sy4">::</span><span class="me2">in</span><span class="br0">(</span>ranges<span class="sy4">::</span><span class="me2">safe_iterator_t</span><span class="sy1">&lt;</span>Rng<span class="sy1">&gt;</span><span class="br0">)</span>, ranges<span class="sy4">::</span><span class="me2">tag</span><span class="sy4">::</span><span class="me2">out</span><span class="br0">(</span>O<span class="br0">)</span><span class="sy1">&gt;</span>
  copy<span class="br0">(</span>Rng<span class="sy3">&amp;&amp;</span> rng, O result<span class="br0">)</span>
<span class="br0">{</span>
   <span class="kw1">return</span> ranges<span class="sy4">::</span><span class="me2">copy</span><span class="br0">(</span>ranges<span class="sy4">::</span><span class="me2">begin</span><span class="br0">(</span>rng<span class="br0">)</span>, ranges<span class="sy4">::</span><span class="me2">end</span><span class="br0">(</span>rng<span class="br0">)</span>, result<span class="br0">)</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div></div>
</td></tr>
<tr>
<th> 版本三
</th></tr>
<tr>
<td>
<div dir="ltr" class="mw-geshi" style="text-align: left;"><div class="cpp source-cpp"><pre class="de1"><span class="kw1">template</span> <span class="sy1">&lt;</span><a href="../iterator/InputIterator.html"><span class="kw2569">ranges::<span class="me2">InputIterator</span></span></a> I, <a href="../iterator/Sentinel.html"><span class="kw2567">ranges::<span class="me2">Sentinel</span></span></a><span class="sy1">&lt;</span>I<span class="sy1">&gt;</span> S, <a href="../iterator/WeaklyIncrementable.html"><span class="kw2564">ranges::<span class="me2">WeaklyIncrementable</span></span></a> O,
          <span class="kw1">class</span> Proj <span class="sy1">=</span> ranges<span class="sy4">::</span><span class="me2">identity</span>,
          <a href="../iterator/IndirectUnaryPredicate.html"><span class="kw2576">ranges::<span class="me2">IndirectUnaryPredicate</span></span></a><span class="sy1">&lt;</span><a href="../iterator/projected.html"><span class="kw2597">ranges::<span class="me2">projected</span></span></a><span class="sy1">&lt;</span>I, Proj<span class="sy1">&gt;&gt;</span> Pred<span class="sy1">&gt;</span>
  requires <a href="../iterator/IndirectlyCopyable.html"><span class="kw2581">ranges::<span class="me2">IndirectlyCopyable</span></span></a><span class="sy1">&lt;</span>I, O<span class="sy1">&gt;</span><span class="br0">(</span><span class="br0">)</span>
ranges<span class="sy4">::</span><span class="me2">tagged_pair</span><span class="sy1">&lt;</span>ranges<span class="sy4">::</span><span class="me2">tag</span><span class="sy4">::</span><span class="me2">in</span><span class="br0">(</span>I<span class="br0">)</span>, ranges<span class="sy4">::</span><span class="me2">tag</span><span class="sy4">::</span><span class="me2">out</span><span class="br0">(</span>O<span class="br0">)</span><span class="sy1">&gt;</span>
  copy_if<span class="br0">(</span>I first, S last, O result, Pred pred, Proj proj <span class="sy1">=</span> Proj<span class="br0">{</span><span class="br0">}</span><span class="br0">)</span>
<span class="br0">{</span>
    <span class="kw1">for</span> <span class="br0">(</span><span class="sy4">;</span> first <span class="sy3">!</span><span class="sy1">=</span> last<span class="sy4">;</span> <span class="sy2">++</span>first<span class="br0">)</span> <span class="br0">{</span>
        <span class="kw1">if</span> <span class="br0">(</span>ranges<span class="sy4">::</span><span class="me2">invoke</span><span class="br0">(</span>pred, ranges<span class="sy4">::</span><span class="me2">invoke</span><span class="br0">(</span>proj, <span class="sy2">*</span>first<span class="br0">)</span><span class="br0">)</span><span class="br0">)</span><span class="br0">{</span>
            <span class="sy2">*</span>result <span class="sy1">=</span> <span class="sy2">*</span>first<span class="sy4">;</span>
            <span class="sy2">++</span>result<span class="sy4">;</span>
        <span class="br0">}</span>
    <span class="br0">}</span>
    <span class="kw1">return</span> <span class="br0">{</span>first, result<span class="br0">}</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div></div>
</td></tr>
<tr>
<th> 版本四
</th></tr>
<tr>
<td>
<div dir="ltr" class="mw-geshi" style="text-align: left;"><div class="cpp source-cpp"><pre class="de1"><span class="kw1">template</span> <span class="sy1">&lt;</span><a href="../range/InputRange.html"><span class="kw2592">ranges::<span class="me2">InputRange</span></span></a> Rng, <a href="../iterator/WeaklyIncrementable.html"><span class="kw2564">ranges::<span class="me2">WeaklyIncrementable</span></span></a> O,
          <span class="kw1">class</span> Proj <span class="sy1">=</span> ranges<span class="sy4">::</span><span class="me2">identity</span>,
          <a href="../iterator/IndirectUnaryPredicate.html"><span class="kw2576">ranges::<span class="me2">IndirectUnaryPredicate</span></span></a><span class="sy1">&lt;</span>
              <a href="../iterator/projected.html"><span class="kw2597">ranges::<span class="me2">projected</span></span></a><span class="sy1">&lt;</span>ranges<span class="sy4">::</span><span class="me2">iterator_t</span><span class="sy1">&lt;</span>Rng<span class="sy1">&gt;</span>, Proj<span class="sy1">&gt;&gt;</span> Pred<span class="sy1">&gt;</span>
  requires <a href="../iterator/IndirectlyCopyable.html"><span class="kw2581">ranges::<span class="me2">IndirectlyCopyable</span></span></a><span class="sy1">&lt;</span>ranges<span class="sy4">::</span><span class="me2">iterator_t</span><span class="sy1">&lt;</span>Rng<span class="sy1">&gt;</span>, O<span class="sy1">&gt;</span><span class="br0">(</span><span class="br0">)</span>
ranges<span class="sy4">::</span><span class="me2">tagged_pair</span><span class="sy1">&lt;</span>ranges<span class="sy4">::</span><span class="me2">tag</span><span class="sy4">::</span><span class="me2">in</span><span class="br0">(</span>ranges<span class="sy4">::</span><span class="me2">safe_iterator_t</span><span class="sy1">&lt;</span>Rng<span class="sy1">&gt;</span><span class="br0">)</span>, ranges<span class="sy4">::</span><span class="me2">tag</span><span class="sy4">::</span><span class="me2">out</span><span class="br0">(</span>O<span class="br0">)</span><span class="sy1">&gt;</span>
  copy_if<span class="br0">(</span>Rng<span class="sy3">&amp;&amp;</span> rng, O result, Pred pred, Proj proj <span class="sy1">=</span> Proj<span class="br0">{</span><span class="br0">}</span><span class="br0">)</span>
<span class="br0">{</span>
   <span class="kw1">return</span> ranges<span class="sy4">::</span><span class="me2">copy_if</span><span class="br0">(</span>ranges<span class="sy4">::</span><span class="me2">begin</span><span class="br0">(</span>rng<span class="br0">)</span>, ranges<span class="sy4">::</span><span class="me2">end</span><span class="br0">(</span>rng<span class="br0">)</span>, result, pred, proj<span class="br0">)</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div></div>
</td></tr></table>
<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">示例</span></h3>
<div class="t-example"><p>下列代码用 copy 复制一个 <code>vector</code> 的内容给另一个，并显示结果 <code>vector</code> ：</p><div class="t-example-live-link"><div class="coliru-btn coliru-btn-run-init">运行此代码</div></div>
<div dir="ltr" class="mw-geshi" style="text-align: left;"><div class="cpp source-cpp"><pre class="de1"><span class="co2">#include &lt;experimental/ranges/algorithm&gt;</span>
<span class="co2">#include &lt;iostream&gt;</span>
<span class="co2">#include &lt;vector&gt;</span>
<span class="co2">#include &lt;experimental/ranges/iterator&gt;</span>
<span class="co2">#include &lt;numeric&gt;</span>
 
<span class="kw4">int</span> main<span class="br0">(</span><span class="br0">)</span>
<span class="br0">{</span>
    <span class="co1">// 参阅 http://zh.cppreference.com/w/cpp/language/namespace_alias</span>
    <span class="kw1">namespace</span> ranges <span class="sy1">=</span> std<span class="sy4">::</span><span class="me2">experimental</span><span class="sy4">::</span><span class="me2">ranges</span><span class="sy4">;</span>
 
    <a href="../../../container/vector.html"><span class="kw1269">std::<span class="me2">vector</span></span></a><span class="sy1">&lt;</span><span class="kw4">int</span><span class="sy1">&gt;</span> from_vector<span class="br0">(</span><span class="nu0">10</span><span class="br0">)</span><span class="sy4">;</span>
    <a href="../../../algorithm/iota.html"><span class="kw1655">std::<span class="me2">iota</span></span></a><span class="br0">(</span>from_vector.<span class="me1">begin</span><span class="br0">(</span><span class="br0">)</span>, from_vector.<span class="me1">end</span><span class="br0">(</span><span class="br0">)</span>, <span class="nu0">0</span><span class="br0">)</span><span class="sy4">;</span>
 
    <a href="../../../container/vector.html"><span class="kw1269">std::<span class="me2">vector</span></span></a><span class="sy1">&lt;</span><span class="kw4">int</span><span class="sy1">&gt;</span> to_vector<span class="sy4">;</span>
    ranges<span class="sy4">::</span><span class="me2">copy_if</span><span class="br0">(</span>from_vector.<span class="me1">begin</span><span class="br0">(</span><span class="br0">)</span>, from_vector.<span class="me1">end</span><span class="br0">(</span><span class="br0">)</span>,
                    ranges<span class="sy4">::</span><span class="me2">back_inserter</span><span class="br0">(</span>to_vector<span class="br0">)</span>,
                    <span class="br0">[</span><span class="br0">]</span><span class="br0">(</span><span class="kw4">const</span> <span class="kw4">auto</span> i<span class="br0">)</span> <span class="br0">{</span>
                       <span class="kw1">return</span> i <span class="sy2">%</span> <span class="nu0">3</span><span class="sy4">;</span>
                    <span class="br0">}</span><span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// 或替用的</span>
<span class="co1">//  std::vector&lt;int&gt; to_vector(from_vector.size());</span>
<span class="co1">//  std::copy(from_vector, to_vector.begin());</span>
 
    <a href="../../../io/cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> <span class="st0">"to_vector contains: "</span><span class="sy4">;</span>
 
    ranges<span class="sy4">::</span><span class="me2">copy</span><span class="br0">(</span>to_vector, ranges<span class="sy4">::</span><span class="me2">ostream_iterator</span><span class="sy1">&lt;</span><span class="kw4">int</span><span class="sy1">&gt;</span><span class="br0">(</span><a href="../../../io/cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a>, <span class="st0">" "</span><span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span>
    <a href="../../../io/cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> <span class="st0">'<span class="es1">\n</span>'</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div></div>
<p>输出：
</p>
<div dir="ltr" class="mw-geshi" style="text-align: left;"><div class="text source-text"><pre class="de1">to_vector contains: 1 2 4 5 7 8</pre></div></div> 
</div>
<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">参阅</span></h3>
<table class="t-dsc-begin">

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../../../algorithm/copy.html" title="cpp/algorithm/copy"> <span class="t-lines"><span>copy</span><span>copy_if</span></span></a></div><div><span class="t-lines"><span></span><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div>
</td>
<td>   将某一范围的元素复制到一个新的位置 <br> <span class="t-mark">(函数模板)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/copy_backward&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/copy backward（页面不存在）"> <span class="t-lines"><span>copy_backward</span></span></a></div></div>
</td>
<td>  按从后往前的顺序复制一个范围内的元素  <br> <span class="t-mark">(函数模板)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/reverse_copy&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/reverse copy（页面不存在）"> <span class="t-lines"><span>reverse_copy</span></span></a></div></div>
</td>
<td>  创建一个范围的逆向副本  <br> <span class="t-mark">(函数模板)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/copy_n&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/copy n（页面不存在）"> <span class="t-lines"><span>copy_n</span></span></a></div></div>
</td>
<td>  将一定数目的元素复制到一个新的位置  <br> <span class="t-mark">(函数模板)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/fill&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/fill（页面不存在）"> <span class="t-lines"><span>fill</span></span></a></div></div>
</td>
<td>  将一个特定值赋值给一个元素范围  <br> <span class="t-mark">(函数模板)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/ranges/algorithm/remove_copy&amp;action=edit&amp;redlink=1" class="new" title="cpp/experimental/ranges/algorithm/remove copy（页面不存在）"> <span class="t-lines"><span>remove_copy</span><span>remove_copy_if</span></span></a></div></div>
</td>
<td>  复制元素范围，忽略满足特定判别标准的元素 <br> <span class="t-mark">(函数模板)</span> </td></tr>
</table>

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